Briefly describe the two types of brush arrangements in a repulsion motor.
What will be an ideal response?
Brush arrangement types in a repulsion motor are:
• brush riding: brushes are in contact with the commutator surface at all times
• brush lifting: brushes lift at approximately 75% of the rotor speed
You might also like to view...
The subsequent problems deal with the improved integrator circuit shown below, where: R1 = R2 = Rs = R.
If Vin is a 5Vpp sine wave of extremely high frequency, what is Vout?
A. ?2.5 V B. a sine wave of the same frequency and phase as Vin C. 0 V D. 2.5 V E. a sine wave of the same frequency but out of phase with Vin
When brazing on a refrigeration line with an attached service valve:
A) The joint should be heated slowly to prevent overheating the valve. B) The line should be attached with quick-setting cement instead of brazed. C) The joint should be heated quickly to avoid overheating the valve. D) The valve should be cut out of the system prior to brazing to avoid overheating.
If a specific metal bar stock deforms 3 inches under a 100-pound load, a 50-pound load will cause it to
deform _____. a. 1.5 inches b. 3 inches c. 4.5 inches d. 6 inches
A vertical distance above a datum point is described as a(n) _____
a. contour b. rise c. differential d. elevation